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English number names group digits in threes: units, thousands, millions, billions. Within each group the hundreds are named, then the tens and units, with hyphens for compound numbers like forty-seven.
Grouping
split digits into groups of three from the right, name each group, then append its scale word
One million two hundred and thirty-four thousand five hundred and sixty-seven.
Yes. British English usually inserts 'and' before the final part, as in 'one hundred and five'; American English often omits it.